Rotary engine.



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5 Shasta-Shadi I'..

N0. 560,676. Patented 0ct.30 |900.

- a. c. P. Anm:nssou.

RoTARv' Emmi.

- [Application led Jan. 9, 1900.. V 4 V QNo Model.) Y S'Sheetr-Sheet 2.

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. (Application tiled Iam. 9, 1G00.) Nc Model.)

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RUTARY- ENGINE.

' A 1i :i med: 0, 1900, m0 lodl.) PP. on an.

Patented '00L 30, |900.

5 shunts-Sheet 5.

. Same.

UNITED STATES PATENT OFFICE,

GEoRG o. -P. ANDERssoN, or PAUL,- Minnsso'rA-f ROTARY ENGINE.

srncrrrcarron refining para or Letters Patent no. 660,676, aerea oaobe'f 3o, i'aoo.

tppnmionfiled-Janien,1900. sesam. s45. (Nomad.)

4To all it may' concern,.-

Be it known that I,I GEORG o.-P. ANISERS- SON, a citizen of the United States, residing at. St. Paul, inthe county of Ramsey and.

State of Minnesota,have invented certain new and useful improvements in Rotary Engines; and I do hereby declare the following to be a ffull, clear, and exact description of the invention, such as will enable-others skilled in thel art towhich it appertains to makeand use the My invention relates to a rotary engine, and has'for -its objects to-'iinprovethe same with 'aview ofobtaining the maximum eiciency Withdsimple-and. durablev mechanism which is not liable to get ont of order and also to provide` an engine Whichlrnay be readily reversed and-easily controlled.

To the above ends my invention consists of the novel devices and combination of Vdevices hereinafter described, and defined inthe claims. Y

The invention is illustrated in the accompanying drawings, wherein like characters' indicate like views. y

Figure l shows thecornplete engine in side elevation with some parts sectioned and others broken away. Fig. 2 is a front elevation of the engine with some parts removed. Fig. 3 isa transverse vertical section taken on the line fc3 m3 of Fig. 4. Fig. 4 is a horizontal section taken on the line :n4 004 of Fig. 3. Fig. 5

`parts throughout the several is a longitudinal section taken on the line m5 :1:5 of Fig. 2, some parts being shown in full .and others broken away. Fig. 6 is a transverse vertical section taken on the line :r6 x6 of Fig. 5', Fig'. 7 is adetail view showing one of the packingfrings in side elevation. Fig. 7? is a transverse section on the line :1:7 m7 of Fig. 7. Figs.,8 and 8a are perspective views of one of the propelling-blocks. Fig. 9 is a section on the line m9 009 of Fig. 8. Fig. l0 is a'plan view showing a portion of the pistondisk and `one of the-propelling-blocks. Fig.

11 is an end elevation of `a bushing or valve-4 seat.- Fig. 12 is a view in diagram showing the snrfaceof the bushing as of cut on the line z s of Fig. l1 and spread out dat.

The main body-casting 1 is somewhat in the form of a cylinder, being -provided with a cylindrical bore 2-and'is therefore generically 5 are cut, as best shown' in Figs.l 3

` able devices.

Aberof the engine. It is, however, provided with a suitable base 3 and withlateral bulges 4., in which horizontal slots or abutment-,seats and 4. The cylinder-beads Gare secu re'd'by' bolts', screws, or otherwise `to Athe cylinder 1,',and they are provided with inwardly-projecting cylindrical hub portions 7, that are concentric with the cylindrical bore 2and terminate at their inner ends a short distance apart, fora purpose presently to be noted. The abutment-seats 5 are extended through the cylinder-head 6, as shown at 5, and the ends of said 'seats are'closed by removable plates 7l, that are secured to the said cylinder-heads by means of screws or other suit- (See'Figs. land By the arrangement above described an annular runway or channel 8 is'formed between the cylindrical bore 2 and thel concentric hubs 7. In this channelor runway 8 the propelling blocks or portions of .therotay piston are mounted to run, as will be presently noted. V

The abutment-seats 5 in'the cylinder 1 extend in the same horizontal plane and stand diametrically opposite to each other, and in each of these seats isa radiallymovable abutment 9, as shown, in the form of a flat bladelike section which,when inovedinward' to its extreme position', closely engages'the hubs 7 -and preferably fits into a shallow groove 10,

formed on the saidhubs. These abutments o'r blades 9 are under strain to move inward from springs 11,compressed between the backsv of the same and the outer extremities of the seats 5. A

The piston member of theengine, which is in the form of a disk 1 2, istA rigidly secured on ashaft'l and is provided-.with suitable propelling blocks or projections, to be presently noted. The piston-disk 12Works and closely fits between the inner extremities of th'e hubs 7 of the cylinder-heads 6, and steam-tight joints are formed between ythe same and the` said hubs by packing-rings 14, sfetated in the said. hubs and 'engaging the opposite faces of the said disk. 4These packing-rings 14 have .tapered inner surfaces which engage" correspondingly-tapered portions,ofv the {'hnbs, 7,

[OCI

and s'aid rings are each split at onefpointlahd vprovided. vwith yt'elescoping ends 15. (Biest shown in Figs. 7 and 7a.) These rings are 'made of l'netal having more or less spring, `which contracts them onto. the coperatng tapered portions of thehubs 7, .and thus produces a ca-mming action which keeps them -forced into 'engagement'with the adjacent novel. At one' side the. so-called pistondisk 12 is extended outward of the hub 7 and at'its outermost point has tangential contact with thebore 2 of the cylinder to form an abutment-retracting cam 16. The so-called propelling blocks or projections are ses.

cured or applied to this projecting cam portion 16, this, as shown, being preferably ace complshed by providing the said cam 16 with 'oppostely-projecting pairs of studs or pins 17, between which the propelling blocks or projections are removably but securely held. The so-'c'alled .propellingablocks .18 project in opposite directions from the cam portion 16 of. the piston-disk, andV they snugly fit in the annular .runways or channels 8,- formed on the opposite sides of said piston-disk, be-

`tween the hubs 7 and the cylinder-bore 2. The

said blocks 18 are preferably, as shown, made in sections and areautoratically expansible,

so as to keep tight engagement with the surfaces of the cylinder over which theyrun. Qne of the hubs 7 is provided with abusining 19, which has a plurality of. ports and is. formed with these ports before itis placedwithinthehub, this being ,done as a matter of convenience; but after the said bushing is placed in workingl position, it inayfor the purposes of this case be treated as an integral and fixed part of said huh'. The bnsh vng19 is provided'with a valve-'seat ,or een that is formed with a pair of segmental Aports' matelyone hundred Iandfeighty degreezU tral bore, which, .as shown, is tape-red and. receives and closely lts a tapered valve20,

20a and 2O", both of which .extend appr best shown in Figs. 3,-4, and 6. It shonh here noted and remembered that this vaive -20 is fixed on the piston-shaft 13 and rotates therewith and with the piston-disk 12.

justably and removably. secured-to the shaft .13 by means of a set-screw 21.v The segmental ports 20a and 20b ofthe .rotary valve 2O move in line withports a b and c d, respectively,.

which ports openradially through the buslif ing'19." Also there aretwo'of the ports d and' ing 19.

are located diametrically oppositeeach' other,- .and are connected by a channel or groove a.. Also'the ports c are two innumber-'andare 1 located diametrica-lly opposite from Leach The ports a. are '-two in number and other, being connectedV by a groove or ehanlnelc','f orme: in the periphery of the bush- "two ot. the ports b, located, vrespectively, diametrically .opposite to eachother. Each port a is located in axialv line with one of the ports c, and each port I) is likewise located in axial linewith one of thepor-ts d.' Thearrange?v As' shown, the said valve 2Ul is rigidly but ad` ment of these .ports is'wfelllillustrated in the diagram view Figi-2. Afpairef steam-passages;- c and f open,l respectively, into the channels a and c'of the bushing 19, botho'f these ports being terminated in a'valve-seat f', 'formed in4 a supplemental casting 22, thatA is suitably' secured one, bulgedport'on 2 3 of the forward cylinder-head 6.11 A' reversing throttlefyaive g is mounted for rotary'move'ment within tV e valve-seat f and is provided with a hand.

pieceor leverv gfby means of whichit may-be moved. The valve is heldin working pesi. 1

tion by .means of aretainilng-plateor other suitable device, and it is formed-with'an admission-port 'g3 and anfeXhaust-portg4, the latter of which' ports opensf'intoa vhollowfor central cavityi. of 'th-esaidv valve. Tlie'ad' 'mission-port g? of `the'thro ttle-'Valve g is in constant communication with the inlet-pas sage g5, which leads fronnthe-V steanlsupfply pipe gs.. The axial passage gi ofthe throttle.

valveV is-in constant] communication with an exhaust-passage g?, whichleads tothe exhaustpipeug @This construction is best shown in' Figs. -and." 'The point'sat which the steampassages e andfopen,respectively, into. the channels 'a and 'c are indicated in `the diagram view, Fig. 12, by the dotted-line circles. .V

The diametrically-'opposite ports b' o f the valve-seat bushing19 are-in communication withthe interiorof.. the cylinder' or with the channel 5, Itlfirottgl'l poi/ts h and h', formed'in lthe hub 7 of the forward cylinder-head, as, The .port h, it

beet shown 'in Figs. 3ra-nd L -will be noted, opens into the channel 8 above,

and thejfort h' opens into said channel below thev ments for .a purpose which wilt-hereinafter appear.' In .e vergif similar manner thediametrically opposite ports dare inr communication' with the cylinder-channel 8, through a pair of rizon-tal plane in which the abuft` e mounted to work, 'this being done rizo -, Thes'prings 11 heretofore noted'as-operat 4 ing upon `tl'naysliding abutments 9 are of pe culiarjiorm, each beingv formed with a' cen.-

tral coil 1 1a and with end coils' 11b.. The center coll 11a givesthe spring greatlyfincreased resilien.ce. v Whe'n the-springs are' applied, as shown 'in Fig. 4, `the force thereof willl be thrown .equally at .'both ends of. the' abut mentaso that the abutmeutsrwill be yield# f vingly held for movementsalways parallel to vtheir original position.

' Returning to vthe consideration of the spe-1 cie construction of the so-called propelling blocks-7 lferetfiore-vnctedj and indicated` as I I ports'ltand k', the former of which opens into 'adjusting to the walls of the channel and is but very slightly damaged by Wear.

,der or channel 8, or, in other words, that 'tween'the said sections andthe bottom of 'irst through the passage g5, thence through entireties by the numeral 18, attention-is particularly called to Figs.4 8 to .10, inclusive. Each block 18 is made up of `a body-section 18a, which fits between the projecting pin 17 of the piston-disk 12 and is provided with a groove 18h, running. entirely around. its four sides transversely of the annular channel .or runway 8. In the groove 18" packingstrips 18.C are placed. These packing-.strips are bent at right angles to form the segmental edges ofthe block, and the projecting ends of the same telescope with the adjacent ends of the coperating packing-strips, as shown at 18d. In thisl way a continuous rectangular andexpan'sible packing is provided. 'lhe sections of this packing are yieldingly pressed outward and held inV close engagement with the four walls ofV the channel or runway 8 by means of light springs 18f, compressed bethe rectangular channel 18", asbest shown in Fig. 9. As is obvious, this packing is self- 'lheoperation of the engine constructed as above described will be substantially as follows: `With the throttle-valve g set in the one extreme position (indicated in t-he drawings and best illustrated in Fig. 6) the piston of the engine will be rotated in the direction indicated by the arrow marked on Fig. 4. That this is 'so is made evident by tracing the open ports'and passages. 'Directing attention first particularly to Figs. 5 'and 6, it will be seen that the live steam from the supply-pipe Q6 finds admission to the cylinder the port g3 of the throttle-valve into the .Vertical passage e, and from thence into the channel a and ports a of the valve-seat bushing 19. With the rotary piston in the position indicated in the drawings and best shown in Figs. 3 and 6 the live steam finds admission from both of the ports a, intothe port. 20 of the valve 20, from thence into the left-hand port b of the bushing, and from thence through the po'rt h into the cylinder-channel 8. It will thus be seen that the steam or motive liuid which is at this inst-ant being admitted is admitted into the channel 8 above the left-hand abutment 9, so that itsforce is exerted to propel the rotary piston 12 and its propelling-blocks 18 in the direction in'dicated by the arrow on Fig. 3. In the same position of the rotarypiston and the valve 20 just indicated the lower section of the cylinportion of the channel or runway 8 which is between the operative or left-hand abutment 9 and the exhaust side of the propellingblock 18, is open to exhaust. This exhaust is first through the passage k to the left-hand port d of the bushing 19, from thence through position.

the port 20b of the rotary valve :2O to one or the other or to both of the ports r of the said bushing, and from thence through the channele' to the vertical passage f. From the passage fthe steam orexhaust tiuid linds aready escape through the exhaustport g4 of lthe throttle-valve g3, thence through the. axial passage 4g, and from thence throughthe passage g7 into the ulti-mate exhaust-pipe g8.

It has been noted that in the particularposition of the piston and valve 20 indicated inthe drawings the ports 20a and 20b of the valve 2O are respectively open to both of their cooperating ports b and d of the bushing. In all other positions or in nearly all .other positions the said ports 20u and 20h will be open to but one of the (.'o'perating pair of ports, and the ports to which they are at any time open will be those which extend tothe particular abutment 9 which at that time is operative or extended inward to its extreme It is obvious from the description already' given that the cam l6,which is carried by the piston -disk 12,engages the springpressed abutments 9 and causes them to recede in the proper order one ata time, so as to ciear the propelling-blocks 18 and then as soonA as the propelling blocks have passed the par ticular abutment permit the same to gradually move inward to assume the operative position. OneI or the other of the said abut'- ments is thus always rendered eltecti ve as a Y base ot' reaction for` the steam. l i To reverse the engine, the lever g is thrown toward the left. into a position at the reverse angle to the cooperating ports and passages from'v that illustrated in' Figs. 2 and 6. vBy this movement of the throttle-valve g the live steam is admitted int-o the vertical passage f, and will find its admission into the cylinder through the passages above noted and traced as the exhaust-passages for the exhaust-steam,y and at the same timethe vertical passage c will be opened to exhaust, and the exhauststeam from the cylinder finds its ,escape through the passages above noted and traced as the admission-passages for the live steam. When the throttle-valve y is moved until its lever g' is turned straight upward, both the admission and exhaust steam is cut off to and from the engine, and thusit will be seen that the valve g not only serves as a reversingvalve butalso, as a throttle-valve, by means of which the speed of the engine may be varied. 1

It will of course be understood that the in ventionabove described is capable of many modications as to its details ot' construction. If it be desired to run 'the engine in one drection only, the valve 2U may be so set on the shaft 113 as to render confined steam expansively effective on the piston. Furthermore, even with a reversible engine the ports may be so arranged as to get the el'ect of the expansion of steam while cut ed from the live steam or source of supply.

That I claim, and desire to secure-by Letters Patent of the United States, is as follows:

IIO

IIS4

v trally-'located pistonseat, in combination withv a radially movable land .yieldingly pressed I 1.. In an engine, a cylinder having Iixed and in'wardly-projacting hub portions of equal diameter positioned concentric to the bore of said cylinder, to form anl annular runway and termin ated short of each other', to form a cenabutment extended entirely across said runf way, a rotary disk-like piston workingin the seat between said hub portions, but formed or cut away to leave free communication from l oneto the other side of said runway, and oppositely-projecting propelling-blocks carried by said piston and filling said runway,- said rotary piston having also a cam-surface which directly engages said abutment and causes the vsame to clear saidv propelling-block, substantially as described.

In a rotary engine, the combination with the cylinder 1 provided with the cylindrical b ore 2, and the pair of seats 5, of the heads 6;,

having the inwardly-projected hubs 7 the rotary piston-disk 12 working between the adja- .-2'5 jections 18 carried by said piston-disk 12 and cent ends of the hub 7 -and provided with the cam-,section 16, the propelling blocks ,or pro# Working inthe -.annular runways formed be- 'tween' said hubs 7 andthe cylinder-boreV 2, v the spring-pressed abutments 9 working in -3o the seats 5 and subject to; said'cam 16, and

vvalve mechanismcontrolled by said rotary piston, substantially as described..

3. In a rotary engine,

having' a propelling projection, and a tapered controlling-valve for the admission and exthe 'combination with a-cylinder having one or moremovable abutvments,vot` a rotary piston within said cylinder haust, mounted to rotate with the said piston but free fcrbotli rotary and longitudinal ad; 4

said shaft 13, and the removable bushing 19 having the ports-a,'a, c, c,'b and d, the cylinder-castiug having the ports h, h and k, la',

scribed. a

Intestimony whereof I aix my signature in presence of two witnesses.

. GEORG C. P. ANDERSSON. VVitnesses: y

CARL G. KRooK, F. D. MERCHANT.

.the said parts operating substantially as dej 

